Juncus bufonius

The scientific name for the weed Toad Rush.

  Knotgrass

An uncommon annual weed of maintained turf surfaces, except for locations which have become worn or with a thin sward, especially in winter sports pitches. Its scientific name is Polygonum aviculare. It is a low growing spreading plant, with leaves that are narrow and hairless. The main flowering period being from June to October, with very small pinkish-white flowers.

  Leontodon autumnalis

The former scientific name for Autumn Hawkbit.

  Lesser Celandine

A perennial and occasional weed of some turf areas, especially those which are less frequently maintained. It has heart-shaped, often shiny, leaves. It has bulbils as roots. It grows well on damp and moist soils and in shaded areas of a lawn, although it will grow in more open areas as well. A preference for a neutral soil types, and more of a loamy to clay soil. It is uncommon on sports turf surfaces. It flowers during March to May, with the flowers being coloured yellow and variable diameter, with 20mm being a median size. Its scientific name is Ficaria verna (formerly Ranunculus ficaria).

  Lesser Trefoil

An annual weed of turf surfaces, including newly sown areas, or thin often weak swards. It has trifoliate leaves like clover, being 3mm to 8mm in length and up to 5mm in width, with a creeping growth habit. It flowers from May to September, having yellow flowers, with a rounded flower head of about 10mm diameter, with many florets. It prefers dry to moist soils; a more neutral soil pH, and in an open environment without shade. Its scientific name is Trifolium dubium. It is also commonly referred to as Yellow Suckling Clover.

  Lotus corniculatus

The scientific name for the weed Common Birds Foot.

  Luzula campestris

The scientific name for the weed Field Woodrush.

  Meadow Buttercup

A common perennial weed of lesser maintained turf surfaces. It is also called Crowfoot, and its scientific name is Ranunculus acris. It is a slightly tufted plant, with three leaflets per leaf, and with the middle one being without a stalk. This is unlike creeping buttercup which does have a stalk here. Its stems are also lightly hairy. It prefers damp soils. It flowers from April to July, with them being yellow in colour.

  Medicago lupulina

The scientific name for the weed Black Medick.

  Mind-Your-Own-Business

A common mat forming perennial weed, with small oval type leaves, being about 6mm in width. This weed which can encroach onto lawns in shady and damp situations, including on soils which may have been damp or wet over the autumn-winter-early spring period but have since dried out. Lesser maintained and neglected turf surfaces would be more prone to this weed than where regular turf maintenance activities take place. The use of lawn sand can help to reduce the weed content, with selective weedkillers mostly having a negligible effect at best to no control at all.